NASA ThesaurusDefinitions of technical expressions
English
to Italian glossary of reflex photography
A simple list of terms, English to Italian.
Astronomy Glossary
One long HTML page with cross-references. Terms and definitions in English.
From
keel to truck / Dalla chiglia al pomo dell'albero Glossary of nautical terms in English, French, German, Italian and Spanish.
Glossary of car-related
terms 
Terms and definitions in English on one HTML page.
Glossary of car racing
terms
Terms and definitions in English on one HTML page.
Free
Flight Glossary (English / French / Italian / Spanish / German)
[Dead 14/02/99]A small glossary of free-flight terms in HTML format, that fits on one page but can be sorted by any of the 5 languages included, or by class.
English
Bookbinding Terminology
Leather Furniture
Terminology
One HTML page. Includes terms related to hides and skins
Mr Horse: Dizionario equestre
italiano 
Glossario di terminologia relativa ai cavalli. Termini e definizioni solo in italiano.
Climbing
dictionary Dictionary of climbing and mountain-related terminology, by Carl Ockier. Terms and definitions in English (British and American) with translations in German, French, Canadian French, Dutch, Italian, Spanish, Swedish and Polish, and links to a Finnish and Japanese version. Very good!
Lexicon of Linguistic
Terminology 